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Sensor Configuration
Learn how to configure the sensor settings.
Catch Explorer Specific Settings
You need to set these settings for a Catch Explorer sensor.
About Time Variable Gain
TVG (Time Variable Gain) is a method that compensate signal loss in the water. Basically, the aim is to have targets or sea bottom displayed in the same color on the echogram, whatever the distance from the sensor.

Sensor Configuration
Learn how to configure the sensor settings.
- Connecting the Sensor to Mosa2
  To configure the sensor, you need to connect it to Mosa2 using a wireless communication or using the Configuration Cable.
- Calibrating the Catch Sensor
  You need to calibrate the catch sensor to make sure you have correct catch measures. This procedure applies for both Catch Explorer and Catch sensors.
- Testing the Catch Sensor on Mosa2
  You need to test the catch sensor to check if the empty/full status works correctly. You can do this regularly.
- Catch Explorer Specific Settings
  You need to set these settings for a Catch Explorer sensor.
  - Configuring the Uplink and Down Settings
    You can configure different settings for uplink and down soundings.
  - About Time Variable Gain
    TVG (Time Variable Gain) is a method that compensate signal loss in the water. Basically, the aim is to have targets or sea bottom displayed in the same color on the echogram, whatever the distance from the sensor.
- Configuring Catch Sensor Telegrams
  If you have a Catch sensor (40kHz), you need to configure the telegrams it transmits. This does not apply for Catch Explorer sensors.
- Configuring the Uplink Power
  You can increase the uplink power of the sensor to increase the power of the signal transmitted. It is useful if you have interferences or if the sensor is far from the vessel.
- Testing Measures
  You can test the measures taken by the sensor (e.g. battery level, temperature, depth) to check that there are no faults.
- Exporting Sensor Configuration Settings for Record Keeping
  You can export in a *.txt file all the settings configured for the sensor (such as ping length, frequency, range, TVG...).
- Exporting Sensor Configuration Settings for the Receiver
  You can export on an XML file the sensor settings that you configured on Mosa2. You can afterward use this file when adding the sensor to a receiver.

About Time Variable Gain

TVG (Time Variable Gain) is a method that compensate signal loss in the water. Basically, the aim is to have targets or sea bottom displayed in the same color on the echogram, whatever the distance from the sensor.

When the sounder sends pings, the deeper the target is, the more attenuated signals will be received and sent back. As a result, if the signal is too much attenuated, echoes (target strength) received from a target might not be as strong as they should be. TVG is here to compensate this effect. It uses a lower gain level when signals travel toward a target at a small distance and higher gain level when signals travel toward deeper targets. The end result is to compensate sounding attenuation and therefore to show a same target strength for a same target at different depths.

You can choose between three different TVG modes:

20 log: use to focus on the bottom, footrope or a school of fish (recommended for Catch Explorer).
40 log: use to focus on individual targets.
30 log: compromise between the two others.


20 log	30 log	40 log